She hit calculate.
Cable sizing is crucial for several reasons:
In the Australian electrical industry, getting your cable sizing right isn't just about efficiency—it’s about safety and compliance. With the unique challenges of the Australian climate (scorching summers) and strict standards (AS/NZS 3008), a "she’ll be right" attitude doesn't cut it.
Using an undersized cable is a major fire hazard. When too much current flows through a thin wire, it generates excessive heat, which can melt insulation and lead to electrical fires. Conversely, a cable that is too large is unnecessarily expensive and difficult to install.
This is the most common source of error. AS/NZS 3008 has specific tables for installation methods.